Traction appendage for wheel tires



A. E.'BJHLER. TRAGTLON APPENDAGE'FOR WHEEL TIRES.

APPLICATION mph AUG.'30,19I9.

Patented Feb. 28, 1922.

UNITED STATES;

BATE-INT, OFFICE.

ALBERT n. nrrrnnn, or OMAHA, NEBR sKa;

TRACTION .APPENDAGE FOR WHEEL TIRES.

T 0 all whom it may concern. I

Be it'known that I, r'lnnnnr EIBIHLER, a citizen of the United States, residing at Omaha, in the county of Douglas, and State of Nebraska, have invented certain new and useful Improvementsin Tract-ion Appendages for Wheel Tires, of wliich the following is a specification. I a

This inventionrelates to traction blocks for vehicle wheelsandhas for its object to provide blocks which maybe readily applied to wheel tires to prevent skidding and particularly for use upon the tires 'of trucks or heavy vehicles when passing through mud holes or ascending slippery inclines.

The invention consists of the novel construction, combination and arrangement of parts as described herein andclaimed, and as illustrated in the accompanying drawing, wherein,

Fig. 1 is a view in transverse section through a vehicle tire, showing one of the blocks mounted thereon. Fig. 2 is a plan view of a bearing-plate provided with a sleeve and pintle. Fig. 3 is an end view of the traction-block, a bearing-plate and a tread-plate. Fig. 4 is a transverse section through the traction-block, bearing-plate,

tread-plate andpintle on line 4-4 of Fig. 1, the tire casing being omitted. Fig. 5 is a side View of a wheel showing the tractionblocks mounted on the tire.

Referring now to the drawing for a more particular description, I provide blocks 6. preferably rectangular in plan, adapted to be removably secured to the tire-casing 7 by any suitable means, the means herein shown consisting of chains 8, together with certain connections, and since the blocks 6 have an adequate area, they will engage the ground to advantage to prevent the tire from slipping or sliding while the wheel is rotating, especially when the ground is wet or-soft; and if a sufficient number of blocks are employed it is obvious that transverse movements or skidding of the wheel may be prevented. I

The device consists, in part of a U-shaped plate of yoke 9 which is mounted upon the felly 10, the arms of the yoke providing a mounting for the inner ends of the pair of comparatively short chains 8, or equivalent members, a tread-plate 11 being connected with the outer ends of said chains. Numeral 12 indicates a flexible strip or cushion inter- Specification of Letters Patent. Patented "Feb. 28, 1922. Application firea- August 30', .1919. Serial No. 320,875.

transverse stresses will be adequately resisted and saidplate 11' will bemaintained at the medialline of the tire.

, The tread-plate has aiconcaved surface conforming approxlmately to, the transverse curvature of the casingorjtireupon which it 18 adapted to be seated, and it isprovided with an outwardly projecting body-portion a, and, as best shown in Fig. 1, it is provided with apair of outwardly projecting arms Z), and, as best shown in Fig.4, said bodygportion a is provided with arecess having a concaved wall 0. a

' Numeral 13 indicates a bearingplate having a pair of apertured arms 14, said plate being provided with a recess having a concaved wall (Z. Numeral 15 indicates a pintle which is disposed in the apertures of the arms 6 and 14, and upon the pintle is loosely mounted a sleeve or roller-member 16; and upon the plates 13 are mounted the blocks 6.

As thus described the blocks 6 may have removal from themud, sand or soft earth in an appreciable degree. Also, it will be appreciated that the weight of the load or the greater part thereof will be sustained by the sleeves, said sleeves being pressed between the concaved surfaces 0 and d, the pintle 15 not sustaining any appreciable weight since the sleeve is loosely mounted thereon, the arms 5 having apertures e of greater area than the area of the pintle in cross-section, whereby the function discharged by the pintle is simply to holdthe parts to prevent separation. It will be seen that the mounting of the parts as described is an important feature. The device is particularly useful upon the wheel-tires of trucks which may carry heavy loads, and since the pressure or stresses will be directed to the sleeves 16, it is considered that the arms I) and 14 and the pintle 15 will not become broken or injured.

I have described construction in detail but I do not wish to be understood as limiting myself in this respect, and changes in form,

1ng block having a pair of ears adapted to register withthe ears of the tread plate, a pintle secured through said ears 'forhin'gedly connecting the bearingblo'ck and thetread plate, said tread plate andbearing block having complemental recesses therein of'siibstantiall'} semi-cylindrical configuration and the portlons of said tread plate and bearing block at the opposite sides ofthe recesses forming stop Shoulders to limit the pivoting of, the bearing block on the tread plate withoutsubjeetingsai'd ears to an edgewi'se stress, and a roller loosely mounted on said'pintle and seated in said recesses, said roller being adapted to takeup and transmit pressure be-. tween the bearingblock and the tread plate when supporting a wheel, and said roller being adapted to turn in said rec'esses'incident for securing the tread plate to a tire, a bearto imposition of axially turning moments imposed on said bearing block while supporting the load. 4

2. In a traction appendage for Wheel tires, a tread plate adapted-to be secured to the tread of a tire, a bearing block for contact with: the road way, said tread plateand bearing block having pairs of spaced apart ears adaptedto "registefia' pintle secured through said ears for hingingj the bearing block to the tread plate, and a roller loosely mounted on the pintle between the tread plate and theb'earing block, and between said ears for directly taking up and transmitting stresses between the bearing block and treadplate when the bearing block is supporting the wl'ieel, said roller being adapted to permit of the turning of the bearing block 'upo'nthe tread' plate while supporting the load, and relieving the pintle and ears from stress.

In testimony whereof, I have afli'xedmy signature 1n presence of two witnesses.

VVit-nesses EDWARD M. Inns;

" ALBERT E. BIHLER, 

